An elevation is different. It shows the face of something, or perhaps more correct, the projection of an object/s to a plane. But my testing suggests it produces SECTIONS, not elevations.
Yes, you can use abbreviations in tables and figures. All abbreviations used in tables and figures should be defined in the table note or figure caption, respectively, even though the abbreviations will be also be defined in the text if they are used there.
There are several different dashes, but the most commonly used are the en dash (â) and the em dash (â). They are so named because they are the same width as the small letter n and capital letter M, respectively. The figure dash is a special typographical character most often used in phone numbers.